阅读说明：本技术 用于试验箱体上红外视窗防凝露的自动控制系统及方法 (Automatic control system and method for preventing condensation of infrared window on test box ) 是由 薛青龙 黄晓光 于 2020-06-12 设计创作，主要内容包括：一种用于试验箱体上红外视窗防凝露的自动控制系统,包括加热单元、检测单元及控制单元；加热单元包括导热筒及电加热结构；导热筒装配于红外视窗的内侧,其内腔连通至透光体的内侧表面；电加热结构贴合并加热导热筒的筒壁,进而加热透光体；检测单元包括多个温度传感器,分别实时检测箱体外温度、箱体内温度以及透光体的表面温度；加热单元的电加热结构以及各温度传感器均与控制单元电性连接。本发明通过多个温度传感器分别且实时地对箱体外温度、箱体内温度以及透光体的表面温度进行检测,并根据三者反馈的温度信号通过电加热结构对导热筒进行加热,从而实现对透光体表面温度的实时、精确控制,有效解决了红外透光体的凝露、结霜现象。(An automatic control system for preventing condensation of an infrared window on a test box body comprises a heating unit, a detection unit and a control unit; the heating unit comprises a heat conduction cylinder and an electric heating structure; the heat conducting cylinder is assembled at the inner side of the infrared window, and the inner cavity of the heat conducting cylinder is communicated to the inner side surface of the light transmitting body; the electric heating structure is attached to and heats the wall of the heat conducting cylinder, so as to heat the light transmitting body; the detection unit comprises a plurality of temperature sensors which respectively detect the temperature outside the box body, the temperature inside the box body and the surface temperature of the light-transmitting body in real time; the electric heating structure of the heating unit and each temperature sensor are electrically connected with the control unit. The invention detects the external temperature of the box body, the internal temperature of the box body and the surface temperature of the light-transmitting body in real time through the plurality of temperature sensors respectively, and heats the heat-conducting cylinder through the electric heating structure according to temperature signals fed back by the three temperature sensors, thereby realizing real-time and accurate control of the surface temperature of the light-transmitting body and effectively solving the condensation and frosting phenomena of the infrared light-transmitting body.)

1. The utility model provides an automatic control system that is used for infrared window to prevent condensation on experimental box which characterized in that:

comprises a heating unit, a detection unit and a control unit;

the heating unit comprises a heat conduction cylinder and an electric heating structure; the heat conducting cylinder is assembled on the inner side of an infrared window in the test box body, and the inner cavity of the heat conducting cylinder is communicated to the inner side surface of a light transmitting body in the infrared window; the electric heating structure is attached to the wall of the heat conducting cylinder, and the inner cavity of the heat conducting cylinder is heated by heating the wall of the heat conducting cylinder, so that the light-transmitting body of the infrared window is heated;

the detection unit comprises a plurality of temperature sensors, and the first temperature sensor is arranged outside the test box body and used for detecting the temperature outside the box body in real time; the second temperature sensor is arranged in the test box body and used for detecting the temperature in the box body in real time; the third temperature sensor is arranged corresponding to the light-transmitting body of the infrared window and used for detecting the surface temperature of the light-transmitting body in real time;

the electric heating structure of the heating unit, the first temperature sensor, the second temperature sensor and the third temperature sensor of the detection unit are electrically connected with the control unit.

2. The automatic control system according to claim 1, characterized in that: the control unit comprises a computer, a human-computer interface and a PLC control module; the human-computer interface and the PLC control module are electrically connected with the computer; the electric heating structure is electrically connected with the PLC control module.

3. The automatic control system according to claim 1, characterized in that: the electric heating structure is an electric heating wire which is attached to the outer side cylinder wall of the heat conducting cylinder.

4. The automatic control system according to claim 1, characterized in that: the inner end of the heat conducting cylinder extends into the test box body, and the inner end of the heat conducting cylinder protrudes out of the inner side face of the box body.

5. The automatic control system according to claim 1, characterized in that: the light-transmitting body is germanium crystal glass.

6. The utility model provides an automatic control method that is used for on experimental box infrared window to prevent condensation which characterized in that: the automatic control system of claim 1 is used for controlling the temperature of the light-transmitting body of the infrared window;

the automatic control method comprises the following steps:

step one, starting test equipment;

step two, the first temperature sensor detects the temperature outside the test box body, generates a first temperature signal and feeds the first temperature signal back to the control unit; the second temperature sensor detects the temperature in the test chamber body and generates a second temperature signal to be fed back to the control unit; the third temperature sensor detects the surface temperature of the light-transmitting body and generates a third temperature signal to be fed back to the control unit;

step three, the control unit receives and compares the first temperature signal, the second temperature signal and the third temperature signal;

if the temperature value corresponding to the second temperature signal is greater than 100 ℃, the control unit controls the electric heating structure to heat the heat conducting cylinder until the temperature value corresponding to the third temperature signal is greater than or equal to 100 ℃;

if the temperature value corresponding to the first temperature signal is smaller than the temperature value corresponding to the second temperature signal, and the temperature value corresponding to the second temperature signal is smaller than 100 ℃, the control unit controls the electric heating structure to heat the heat conducting cylinder until the temperature value corresponding to the third temperature signal is larger than the temperature value corresponding to the second temperature signal;

if the temperature value corresponding to the second temperature signal is smaller than the temperature value corresponding to the first temperature signal, the control unit controls the electric heating structure to heat the heat conducting cylinder until the temperature value corresponding to the third temperature signal is larger than the temperature value corresponding to the first temperature signal.

Technical Field

The invention relates to the field of environmental test equipment, in particular to an automatic control system and method for preventing condensation of an infrared window on a multi-comprehensive test box body.

Background

The multi-comprehensive environment test refers to that at least two environments in various environments such as vibration, temperature, humidity, air pressure and the like are combined to form a test environment. The multi-comprehensive-environment test system simulates natural environment (such as vibration, temperature, humidity and air pressure) in an effective space range and then detects various performance indexes of a tested piece. The multi-comprehensive-environment test system is widely applied to relevant fields of aerospace products, information electronic instruments, materials, electricians, various electronic components and the like.

The multi-comprehensive-environment test system comprises a plurality of parts such as vibration, temperature, humidity, pressure and the like, for example, the test environment of the three-comprehensive-environment test system is usually a combination of vibration, temperature and humidity, and the combination of the test environments is applied to a tested piece to complete the related evaluation of the tested piece. Wherein, when carrying out temperature, humidity, vibration test, the test piece need carry out thermal imaging through infrared thermal imager, and infrared light need can detect the test piece through infrared glass side, so need install infrared glass on experimental box and guarantee that glass does not have frosting and water droplet, otherwise will influence infrared thermal imaging's effect.

Disclosure of Invention

The invention aims to provide an automatic control system and method for preventing condensation of an infrared window on a test box body.

In order to achieve the purpose, the invention adopts the technical scheme that:

an automatic control system for preventing condensation of an infrared window on a test box body comprises a heating unit, a detection unit and a control unit;

the heating unit comprises a heat conduction cylinder and an electric heating structure; the heat conducting cylinder is assembled on the inner side of an infrared window in the test box body, and the inner cavity of the heat conducting cylinder is communicated to the inner side surface of a light transmitting body in the infrared window; the electric heating structure is attached to the wall of the heat conducting cylinder, and the inner cavity of the heat conducting cylinder is heated by heating the wall of the heat conducting cylinder, so that the light-transmitting body of the infrared window is heated;

the detection unit comprises a plurality of temperature sensors, and the first temperature sensor is arranged outside the test box body and used for detecting the temperature outside the box body in real time; the second temperature sensor is arranged in the test box body and used for detecting the temperature in the box body in real time; the third temperature sensor is arranged corresponding to the light-transmitting body of the infrared window and used for detecting the surface temperature of the light-transmitting body in real time;

the electric heating structure of the heating unit, the first temperature sensor, the second temperature sensor and the third temperature sensor of the detection unit are electrically connected with the control unit.

The relevant content in the above technical solution is explained as follows:

1. in the scheme, the control unit comprises a computer, a human-computer interface and a PLC control module; the human-computer interface and the PLC control module are electrically connected with the computer; the electric heating structure is electrically connected with the PLC control module.

2. In the above scheme, the electric heating structure is an electric heating wire, and the electric heating wire is attached to the outer side cylinder wall of the heat conducting cylinder.

3. In the scheme, the inner end of the heat conducting cylinder extends into the test box body, and the inner end of the heat conducting cylinder protrudes out of the inner side surface of the box body.

4. In the above scheme, the light-transmitting body is germanium crystal glass.

In order to achieve the purpose, the invention adopts another technical scheme that:

an automatic control method for preventing condensation of an infrared window on a test box body is used for matching with an automatic control system to control the temperature of a light-transmitting body of the infrared window;

the automatic control method comprises the following steps:

step one, starting test equipment;

step two, the first temperature sensor detects the temperature outside the test box body, generates a first temperature signal and feeds the first temperature signal back to the control unit; the second temperature sensor detects the temperature in the test chamber body and generates a second temperature signal to be fed back to the control unit; the third temperature sensor detects the surface temperature of the light-transmitting body and generates a third temperature signal to be fed back to the control unit;

step three, the control unit receives and compares the first temperature signal, the second temperature signal and the third temperature signal;

if the temperature value corresponding to the second temperature signal is greater than 100 ℃, the control unit controls the electric heating structure to heat the heat conducting cylinder until the temperature value corresponding to the third temperature signal is greater than or equal to 100 ℃;

if the temperature value corresponding to the first temperature signal is smaller than the temperature value corresponding to the second temperature signal, and the temperature value corresponding to the second temperature signal is smaller than 100 ℃, the control unit controls the electric heating structure to heat the heat conducting cylinder until the temperature value corresponding to the third temperature signal is larger than the temperature value corresponding to the second temperature signal;

if the temperature value corresponding to the second temperature signal is smaller than the temperature value corresponding to the first temperature signal, the control unit controls the electric heating structure to heat the heat conducting cylinder until the temperature value corresponding to the third temperature signal is larger than the temperature value corresponding to the first temperature signal.

The working principle and the advantages of the invention are as follows:

the invention relates to an automatic control system for preventing condensation of an infrared window on a test box body, which comprises a heating unit, a detection unit and a control unit, wherein the heating unit is used for heating the infrared window; the heating unit comprises a heat conduction cylinder and an electric heating structure; the heat conducting cylinder is assembled at the inner side of the infrared window, and the inner cavity of the heat conducting cylinder is communicated to the inner side surface of the light transmitting body; the electric heating structure is attached to and heats the wall of the heat conducting cylinder, so as to heat the light transmitting body; the detection unit comprises a plurality of temperature sensors which respectively detect the temperature outside the box body, the temperature inside the box body and the surface temperature of the light-transmitting body in real time; the electric heating structure of the heating unit and each temperature sensor are electrically connected with the control unit.

Compared with the prior art, the invention detects the external temperature of the box body, the internal temperature of the box body and the surface temperature of the light-transmitting body respectively and in real time through the plurality of temperature sensors, and heats the heat-conducting cylinder through the electric heating structure according to temperature signals fed back by the three temperature sensors, thereby realizing real-time and accurate control of the surface temperature of the light-transmitting body, effectively solving the condensation and frosting phenomena of the infrared light-transmitting body, ensuring long-time and reliable implementation of a comprehensive test, and flexibly and accurately coping with the influence caused by the change of the internal temperature and the external temperature of the box.

Drawings

FIG. 1 is a schematic view of a test chamber according to an embodiment of the present invention;

FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic block diagram of an automatic control system according to an embodiment of the present invention;

fig. 4 is a flow chart of an automatic control method according to an embodiment of the present invention.

In the above drawings: 1. a heat conducting tube; 2. an electrical heating structure; 3. a test box body; 4. an infrared window; 5. an inner cavity of the heat conducting cylinder; 6. a light transmitting body.

Detailed Description

The invention is further described with reference to the following figures and examples: